Understanding perf data & advice...re CIFS

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vikingboy

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So Im running out of knowledge horsepower on this one and wanted to get some advice from the experts.
I've recently been optimising my system and am already blown away by the results but I suspect there is some more in it to give before I need to condemn it into production and stop fiddling.

Server system is x9srl-f, e5-1620v2, 32GB ECC, 2*9211-8i (R16), 10*WD 4TB Reds, Intel x520 10gbe, 9.2.1.7 on Crucial USB stick.

Dog old server used for testing connection, Intel Q6600 CPU @ 2.4Ghz, 2GB RAM, 16*1TB RAID6 Areca 1280ML on a shonky old Nvidia engineering sample motherboard...with a Intel x520 (way past retirement age)

To bring you up to speed with what Ive done so far with the new server,
Tested/Benched CPU - ok
Memtest+ RAM - 4 passes clean
Verified all disks with surface scans - all ok
Tested all disks (dd ) in parallel and individually and they are all performing within spec, circa 150MB/s
Connected two machines directly and tuned 10gbe (large frames/basic tunables)

EDIT: since posting the original thread Ive found my client is maxed out at 5gbps when receiving data due to CPU load @ 90%+.

client->server = stable 9.90gbps
server->client = circa 5gbps

Here's the disk perfs...

Code:
[admin@freenas] /mnt/RAID/share% dd if=/dev/zero of=tmp.dat bs=2048k count=50k
51200+0 records in
51200+0 records out
107374182400 bytes transferred in 127.213963 secs (844044001 bytes/sec) (804MB/s)

[admin@freenas] /mnt/RAID/share% dd if=tmp.dat of=/dev/null bs=2048k count=50k
51200+0 records in
51200+0 records out
107374182400 bytes transferred in 132.921829 secs (807799465 bytes/sec) (770MB/s)


I was trying to figure out how to verify that my disks are performing over the network connection as expected. I saw a suggestion that ATTO would be a good test. Here's my result....

i-B3fTjhB-L.png


I ran a 'zpool iostat' along side this and it produced the following results....which are clearly 'odd'. I don't understand why the bandwidth read column is mostly 0's, I'm guessing its because everything is being retrieved from cache and the access isn't touching the disks? I'd welcome any feedback as to further understand and if possible improve the read performance.

Code:
[admin@freenas] /% zpool iostat 1
               capacity     operations    bandwidth
pool        alloc   free   read  write   read  write
----------  -----  -----  -----  -----  -----  -----
RAID        1.14T  35.1T     79     56  9.76M  3.32M
RAID        1.14T  35.1T      0      0      0      0
RAID        1.14T  35.1T      0      0      0      0
RAID        1.14T  35.1T      0      0      0      0
RAID        1.14T  35.1T      0      0      0      0
RAID        1.14T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0  1.89K      0   173M
RAID        1.15T  35.1T      0    780      0  65.7M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    720      0  59.4M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    787      0  64.8M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0     65      0  8.24M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    301      0  7.83M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    761      0  64.8M
RAID        1.15T  35.1T      0     48      0  6.12M
RAID        1.15T  35.1T      0    714      0  58.7M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0   128K
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    138      0  15.8M
RAID        1.15T  35.1T      0    326      0  8.53M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    761      0  64.8M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    276      0  1.21M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.14T  35.1T      0    241      0   999K
RAID        1.14T  35.1T      0      0      0      0
RAID        1.14T  35.1T      0    797      0  64.7M
RAID        1.15T  35.1T      0  5.16K      0   595M
RAID        1.15T  35.1T      0  5.64K      0   654M
RAID        1.15T  35.1T      0  5.58K      0   643M
RAID        1.15T  35.1T      0    604      0  43.0M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0      0      0   128K
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    498      0  28.7M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    362      0  15.7M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    714      0  58.7M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    552      0  35.7M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0    426      0  53.3M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    637      0  49.3M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    761      0  64.8M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    363      0  15.6M
RAID        1.15T  35.1T      0    399      0  50.0M
RAID        1.15T  35.1T      0  1.57K      0   139M
RAID        1.15T  35.1T      0  1.77K      0   135M
RAID        1.15T  35.1T      0  1.49K      0   130M
RAID        1.15T  35.1T      0    763      0  64.8M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    418      0  22.2M
RAID        1.15T  35.1T      0    885      0  80.3M
RAID        1.15T  35.1T      0  2.86K      0   244M
RAID        1.15T  35.1T      0  2.98K      0   259M
RAID        1.15T  35.1T      0  2.68K      0   250M
RAID        1.15T  35.1T      0  1.05K      0  73.9M
RAID        1.15T  35.1T      0    550      0  68.8M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    734      0  61.2M
RAID        1.15T  35.1T      0  1.60K      0   174M
RAID        1.15T  35.1T      0  4.17K      0   413M
RAID        1.15T  35.1T      0  4.35K      0   456M
RAID        1.15T  35.1T      0  3.92K      0   406M
RAID        1.15T  35.1T      0  2.81K      0   296M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    379      0  17.6M
RAID        1.15T  35.1T      0     2K      0   194M
RAID        1.15T  35.1T      0  4.22K      0   474M
RAID        1.15T  35.1T      0  5.38K      0   620M
RAID        1.15T  35.1T      0  5.07K      0   581M
RAID        1.15T  35.1T      0  5.42K      0   625M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    243      0  1.08M
RAID        1.15T  35.1T      0  2.32K      0   234M
RAID        1.15T  35.1T      0  5.35K      0   617M
RAID        1.15T  35.1T      0  5.33K      0   646M
RAID        1.15T  35.1T      0  5.73K      0   661M
RAID        1.15T  35.1T      0  5.32K      0   643M
RAID        1.15T  35.1T      0  1.28K      0   130M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0  2.43K      0   248M
RAID        1.15T  35.1T      0  5.32K      0   612M
RAID        1.15T  35.1T      0  4.94K      0   596M
RAID        1.15T  35.1T      0  6.07K      0   740M
RAID        1.15T  35.1T      0  5.80K      0   702M
RAID        1.15T  35.1T      0  1.30K      0   125M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0    500      0  31.8M
RAID        1.15T  35.1T      0  2.46K      0   252M
RAID        1.15T  35.1T      0  5.72K      0   667M
RAID        1.15T  35.1T      0  4.69K      0   561M
RAID        1.15T  35.1T      0  6.21K      0   757M
RAID        1.15T  35.1T      0  6.50K      0   789M
RAID        1.15T  35.1T      0    497      0  28.4M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0  2.44K      0   250M
RAID        1.15T  35.1T      0  5.30K      0   611M
RAID        1.15T  35.1T      0  6.27K      0   767M
RAID        1.15T  35.1T      0  5.66K      0   655M
RAID        1.15T  35.1T      0  4.92K      0   586M
RAID        1.15T  35.1T      0  1.71K      0   187M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0  2.52K      0   259M
RAID        1.15T  35.1T      0  5.81K      0   700M
RAID        1.15T  35.1T      0  4.54K      0   520M
RAID        1.15T  35.1T      0  6.30K      0   769M
RAID        1.15T  35.1T      0  6.15K      0   749M
RAID        1.15T  35.1T      0  5.77K      0   673M
RAID        1.15T  35.1T      0  3.36K      0   383M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0  2.44K      0   250M
RAID        1.15T  35.1T      0  5.43K      0   627M
RAID        1.15T  35.1T      0  6.27K      0   735M
RAID        1.15T  35.1T      0  4.85K      0   577M
RAID        1.15T  35.1T      0  5.84K      0   710M
RAID        1.15T  35.1T      0  6.18K      0   752M
RAID        1.15T  35.1T      0  4.10K      0   453M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0  2.53K      0   260M
RAID        1.15T  35.1T      0  5.60K      0   647M
RAID        1.15T  35.1T      0  6.60K      0   774M
RAID        1.15T  35.1T      0  5.43K      0   659M
RAID        1.15T  35.1T      0  5.81K      0   671M
RAID        1.15T  35.1T      0  5.80K      0   706M
RAID        1.15T  35.1T      0  3.58K      0   389M
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0
RAID        1.15T  35.1T      0      0      0      0


Edit: I just ran a 'arcstat.py -f read,hits,miss,hit%,arcsz 1' and cache hits are 100%...

Code:
[admin@freenas] /% arcstat.py -f read,hits,miss,hit%,arcsz 1
read  hits  miss  hit%  arcsz
   0     0     0     0    19G
   4     4     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
   8     8     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
  50    50     0   100    19G
  34    34     0   100    20G
  14    14     0   100    20G
  14    14     0   100    21G
  86    86     0   100    21G
202   202     0   100    21G
202   202     0   100    21G
199   199     0   100    21G
127   127     0   100    21G
8.8K  8.8K     0   100    21G
18K   18K     0   100    21G
17K   17K     0   100    21G
18K   18K     0   100    21G
read  hits  miss  hit%  arcsz
10.0K  10.0K     0   100    21G
208   208     0   100    21G
451   451     0   100    21G
439   439     0   100    21G
409   409     0   100    21G
212   212     0   100    21G
9.9K  9.9K     0   100    21G
18K   18K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
7.5K  7.5K     0   100    21G
499   499     0   100    21G
865   865     0   100    21G
809   809     0   100    21G
820   820     0   100    21G
329   329     0   100    21G
8.4K  8.4K     0   100    21G
13K   13K     0   100    21G
13K   13K     0   100    21G
13K   13K     0   100    21G
5.8K  5.8K     0   100    21G
read  hits  miss  hit%  arcsz
1.0K  1.0K     0   100    21G
1.6K  1.6K     0   100    21G
1.8K  1.8K     0   100    21G
1.6K  1.6K     0   100    21G
569   569     0   100    21G
8.3K  8.3K     0   100    21G
12K   12K     0   100    21G
12K   12K     0   100    21G
12K   12K     0   100    21G
4.2K  4.2K     0   100    21G
2.3K  2.3K     0   100    21G
3.2K  3.2K     0   100    21G
3.1K  3.1K     0   100    21G
3.3K  3.3K     0   100    21G
869   869     0   100    21G
9.7K  9.7K     0   100    21G
12K   12K     0   100    21G
12K   12K     0   100    21G
12K   12K     0   100    21G
6.1K  6.1K     0   100    21G
4.7K  4.7K     0   100    21G
read  hits  miss  hit%  arcsz
5.6K  5.6K     0   100    21G
5.7K  5.7K     0   100    21G
5.7K  5.7K     0   100    21G
1.3K  1.3K     0   100    21G
9.0K  9.0K     0   100    21G
10K   10K     0   100    21G
10K   10K     0   100    21G
10K   10K     0   100    21G
2.3K  2.3K     0   100    21G
8.3K  8.3K     0   100    21G
9.6K  9.6K     0   100    21G
9.9K  9.9K     0   100    21G
9.7K  9.7K     0   100    21G
1.7K  1.7K     0   100    21G
9.1K  9.1K     0   100    21G
10K   10K     0   100    21G
10K   10K     0   100    21G
10K   10K     0   100    21G
1.3K  1.3K     0   100    21G
13K   13K     0   100    21G
14K   14K     0   100    21G
read  hits  miss  hit%  arcsz
14K   14K     0   100    21G
14K   14K     0   100    21G
808   808     0   100    21G
4.0K  4.0K     0   100    21G
5.2K  5.2K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
345   345     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
16K   16K     0   100    21G
17K   17K     0   100    21G
2.5K  2.5K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
2.1K  2.1K     0   100    21G
17K   17K     0   100    21G
18K   18K     0   100    21G
18K   18K     0   100    21G
read  hits  miss  hit%  arcsz
18K   18K     0   100    21G
4.3K  4.3K     0   100    21G
5.2K  5.2K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.2K  5.2K     0   100    21G
18K   18K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
16K   16K     0   100    21G
1.0K  1.0K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.4K  5.4K     0   100    21G
5.8K  5.8K     0   100    21G
19K   19K     0   100    21G
19K   19K     0   100    21G
15K   15K     0   100    21G
16K   16K     0   100    21G
read  hits  miss  hit%  arcsz
1.5K  1.5K     0   100    21G
5.2K  5.2K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
4.2K  4.2K     0   100    21G
6.0K  6.0K     0   100    21G
18K   18K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
16K   16K     0   100    21G
5.0K  5.0K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
3.6K  3.6K     0   100    21G
7.9K  7.9K     0   100    21G
read  hits  miss  hit%  arcsz
17K   17K     0   100    21G
18K   18K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
4.8K  4.8K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
5.3K  5.3K     0   100    21G
3.8K  3.8K     0   100    21G
9.4K  9.4K     0   100    21G
17K   17K     0   100    21G
18K   18K     0   100    21G
16K   16K     0   100    21G
17K   17K     0   100    21G
17K   17K     0   100    21G
4.3K  4.3K     0   100    21G
5.0K  5.0K     0   100    21G
5.3K  5.3K     0   100    21G
read  hits  miss  hit%  arcsz
5.1K  5.1K     0   100    21G
5.2K  5.2K     0   100    21G
5.1K  5.1K     0   100    21G
3.9K  3.9K     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
141   141     0   100    19G
   7     7     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
   4     4     0   100    19G
 
Last edited:
C

cyberjock

Inactive Account
Joined
Mar 25, 2012
Messages
19,525
5Gbps on 10Gb NICs is pretty much your "sign" of where the problem is. Do keep in mind that Intel 10Gb NICs don't generally give you 10Gb of actual throughput. From what I've seen it's typically 7-8Gb. For most users at home (myself included) you probably won't miss that 2-3Gb/sec as you hadn't quite saturated your NIC anyone because of pool speeds and such. Don't get me wrong, the dd test shows that your pool *could* saturate a 7Gb/sec link, but the dd test is a bit overly optimistic as the data is being generated from /dev/zero vice going through network hardware, a network protocol, etc and the writes are the most optimal you are going to get with ZFS.

I'd say that if you can fix your CPU problem you'll probably find performance in the 300-400MB/sec range assuming you don't hit some other crappy bottleneck.
 
V

vikingboy

Explorer
Joined
Aug 3, 2014
Messages
71
Thanks for your advice, Ive experimented as much as possible with the network card settings and this client just doesn't have more to give than 7gbps, the additional 2gbps hasn't resulted in any meaningful change to the ATTO results either.
I'm going to call it a day for tweaking net perf. Here's where I got to, CPU utilisation pegged at 75%, 3 cores flat out and a steady 7gbps.
I'll do some real world data transfers and see where it lands, 3-400KB/s would be fine.


i-ZmjgfR8.png
 
V

vikingboy

Explorer
Joined
Aug 3, 2014
Messages
71
Good guess Cyberjock - copying some disk images over resulted in speeds between 360MB/s and 405MB/s. Thats a solid 20% more than I was hoping for.
Thanks for your help.
 
C

cyberjock

Inactive Account
Joined
Mar 25, 2012
Messages
19,525
Hehe. I've been doing this for a while. Kind of "know" what range to expect. ;)
 
V

vikingboy

Explorer
Joined
Aug 3, 2014
Messages
71
tweaked my macbook & sonnet thunderbolt / 10gbe interface enclosure.....sadly limited by disk speed now....pffffttttt, where are those SSD's :)

i-cZ5FJS4-M.png
 
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